LM2662MX ,Switched Capacitor Voltage ConverterElectrical CharacteristicsLimits in standard typeface are for T = 25˚C, and limits in boldface type ..
LM2662MX/NOPB ,Switched Capacitor Voltage Converter 8-SOIC -40 to 85 SNVS002E–JANUARY 1999–REVISED OCTOBER 20145 Pin Configuration and Functions8 Pins 8 PinsLM2662 SOI ..
LM2662MX/NOPB ,Switched Capacitor Voltage Converter 8-SOIC -40 to 85Features 3 DescriptionThe LM2662/LM2663 CMOS charge-pump voltage1• Inverts or Doubles Input Supply ..
LM2663M ,Switched Capacitor Voltage ConverterFeaturesn Inverts or doubles input supply voltageThe LM2662/LM2663 CMOS charge-pump voltage con-ver ..
LM2663MX ,Switched Capacitor Voltage ConverterFeaturesn Inverts or doubles input supply voltageThe LM2662/LM2663 CMOS charge-pump voltage con-ver ..
LM2663MX ,Switched Capacitor Voltage ConverterFeatures 3 DescriptionThe LM2662/LM2663 CMOS charge-pump voltage1• Inverts or Doubles Input Supply ..
LM4991 ,3W Audio Power Amplifier with Shutdown Modefeatures include thermal shutdown pro- n No output coupling capacitors, snubber networks,tection, u ..
LM4991LD ,3W Audio Power Amplifier with Shutdown ModeGeneral Description Key Specificationsn Improved PSRR at 217kHz and 1kHz 64dB (typ)The LM4991 is a ..
LM4991LD/NOPB ,3W Audio Power Amplifier with Shutdown Mode 8-WSON -40 to 85features include thermal shutdown• Wireless and Cellular Handsetsprotection, unity-gain stability, ..
LM4991LDX ,3W Audio Power Amplifier with Shutdown ModeElectrical Characteristics V =5V (Notes 2, 3)DDThe following specifications apply for V = 5V and R ..
LM4991MA ,3W Audio Power Amplifier with Shutdown ModeFeaturesBoomer audio power amplifiers are designed specifically ton Available in space-saving LLP a ..
LM4991MAX ,3W Audio Power Amplifier with Shutdown ModeLM4991 3W Audio Power Amplifier with Shutdown ModeMay 2003LM49913W Audio Power Amplifier with Shutd ..
LM2662M-LM2662MX-LM2663M-LM2663MX
Switched Capacitor Voltage Converter
LM2662/LM2663
Switched Capacitor Voltage Converter
General DescriptionThe LM2662/LM2663 CMOS charge-pump voltage con-
verter invertsa positive voltageinthe rangeof 1.5Vto 5.5Vthe corresponding negative voltage. The LM2662/LM2663
uses two low cost capacitorsto provide 200 mAof output
current without the cost, size, and EMI relatedto inductor
based converters. Withan operating currentof only 300µA
and operating efficiency greater than 90%at most loads,the
LM2662/LM2663 provides ideal performance for battery
powered systems. The LM2662/LM2663 may alsobe useda positive voltage doubler.
The oscillator frequency canbe loweredby addingan exter-
nal capacitortothe OSC pin.Also,the OSCpin maybe used drive the LM2662/LM2663 withan external clock. For
LM2662,a frequency control (FC) pin selects the oscillator
frequencyof20 kHzor 150 kHz. For LM2663,an external
shutdown (SD)pin replaces theFC pin. TheSDpin canbe
usedto disable the device and reducethe quiescent current10 µA. The oscillator frequencyfor LM2663is 150 kHz.
Features Invertsor doubles input supply voltage Narrow SO-8 Package 3.5Ω typical output resistance 86% typical conversion efficiencyat 200 mA (LM2662) selectable oscillator
frequency:20 kHz/150 kHz (LM2663) low current shutdown mode
Applications Laptop computers Cellular phones Medical instruments Operational amplifier power supplies Interface power supplies Handheld instruments
Basic Application Circuits
Voltage Inverter Positive Voltage DoublerSplitting VINin Half
January 1999
LM2662/LM2663
Switched
Capacitor
oltage
Converter
